BRPI0719200A2 - PAPER CUTTING REMOVAL DEVICE - Google Patents

Abstract

A system having an upstream module M for storing cardboard blanks, a central module C with a device for taking the blanks from the magazine, and a downstream packing and packaging module V having a station where the blanks are erected. The extractor arm is mounted on a carriage which is movable so as to move the blanks lengthwise and the arm is movable relative to the carriage by an actuating mechanism which enables the arm to articulate about an axis. The distance D between the exit edge of the magazine and the reference point of the station is fixed, and the carriage controls the movements of the blank extracted from the magazine in order to avert the risk of interference with the magazine and to position the blank in the station to enable it to be erected, and this for a whole range of forms of blanks.

Description

Descriptive Report of the Invention Patent for "PAPER CUTTING DEVICE".

The present invention relates to an improvement in the device for removing cardboard cuttings that are stocked in a shelf and, in particular, the shelf of a machine that forms these cutouts.

This withdrawal device is in the form of an arm provided with several suction cups that capture the depression cutout.

In fact, the present invention relates to an improvement of this puller arm in order to improve its effectiveness and to give it a universal character.

Depending on the type of forming machine and, in particular, depending on the size of the cut-outs, the withdrawal device can accommodate one or more suction cup arms. In general, this extraction arm is adapted to a cutout model.

With the evolution of increasingly multipurpose forming machines, it is difficult to have a 100% effective withdrawal device for the extraction of all models of cutouts capable of being formed into one machine.

Shelf removal can effectively present problems due to the larger variety of shapes.

The extraction arm cannot hold the cutouts anywhere; the suction cups should be positioned precisely on the cutout.

When the cutout is formed directly with the extraction arm, the suction cups can only be operated over a limited part of that cutout.

Thus, for certain clippings formats, the number of active suction cups can sometimes prove to be insufficient to properly extract the clip that is retained off the shelf, leading to failures and incidents.

The present invention proposes means for making better use of the available pulling force on the arm and overcoming the drawbacks of current withdrawal devices.

It makes it possible to propose devices capable of handling a greater variety of cut shapes with maximum efficiency at the cut-off level, that is, it allows them to be extracted without failure.

In general, the invention makes it easier to generate all situations induced by users' wishes, whether it is the multiplicity of cutout and box formats or even cadences, offering a particularly effective extraction of any type of force. - bush.

According to the invention, the shelf withdrawal device comprises - at least one extraction arm which is provided with suction cups and - two activation circuits of these suction cups, which activation circuits are respectively connected to the ends of that arm. and are increasingly provided with means to be active together or separately, and these suction cups themselves are wholly or partly equipped with three-way multifunctional valves, which are, on the one hand, capable of allow the selection of the use of a maximum of 20 suction cups for the cut-off extraction operation and, on the other hand, to isolate these circuits from each other in order to enable the suction cup (s) to be deflected to form this clipping, for example.

Always in accordance with the invention, the means for making the suction cup supply circuits active or inactive are constituted by distributors which allow a quick airing of the circuit in case of a power interruption of the suction cups fed by that suction circuit.

According to a preferred arrangement of the invention, the length of the cut-out extraction arm corresponds substantially to the size of the largest of these cut-outs in the case of cut-outs for making "American box" and slightly less in the case of cut-outs. the making of roll-up boxes. Always according to the invention, the suction cups supply circuits are upstream of the arm in the form of a double tubing, which cooperates with a clamp system which ensures the fixing and positioning of this tubing over a line 5 corresponds to the neutral fiber of the joint between the support of that arm and the part integral with the machine frame on which this support is articulated.

But the invention will be further detailed with the aid of the following description and accompanying drawings, given by way of indication, in which:

- Figure 1 shows, schematically represented, a device

withdrawal device associated with the shelf of a cutter and a cutout model also appears in this figure, and in particular a roll-up cutout;

Figure 2 represents the box made from the cutout visible in Figure 1; .

- Figure 3 schematically depicts the withdrawal arm and the two suction cup feeding circuits, each of which is provided with its distributor;

Figure 4 shows a partial section of the extraction arm at one suction cup level to show the three-way valve; ,

Figure 5 is an external view of the extraction arm at the level of one of the valves; ■; · * -

- Figure 6 is a section of the part that supports the extraction arm, showing the installation system of the supply circuits of the

suckers. i:

As shown in Figure 1, the withdrawal device 1 is disposed at the exit of the shelf 2 of a recess forming machine 3 which is stored in that shelf.

The withdrawal device 1 is comprised of an elongate bar-shaped extraction arm 4 and this arm 4 is provided with several fans 5 which depress the cutout 3 at the exit from the shelf 2.

The arm 4 is movable under appropriate unrepresented means for transferring the cutout 3 at the level of a forming station,

THE

for example.

Cutout 3 shown in figure 1 is a box cutout of the roll type. This cutout has sides 7, turns 8, and a connecting tongue 9. It can also include, as shown in the figure, handles 10 disposed on the smaller sides, for example, and / or openings 11 on the other sides, which gives, after shaping, a box 6 as shown in Figure 2.

In addition to the cutouts, the shape of which may change, the withdrawal arm 4 may therefore be carried to load cutouts 3 which have holes such as the handles 10 and / or the openings 11.

In view of these holes, the suction cups 5 of the arm (s) 4 are ineffective and, in addition, they make the other suction cups lose their effectiveness due to the exhaust they generate.

This difficulty exists regardless of the number of arms

prices 4; with one arm 4, certain suction cups 5 may be in front of openings 11; with two arms 4, certain suction cups 5 may be facing fists 10.

For capturing and moving the cutouts 3 without failure, the arm 4 has a length which is, for example, of the order of dimensions of the largest cutout shape 3 and it has a large number of suction cups 5.

The length of the arm 4 may correspond to the size of the "American box" type cutouts 3, and may be slightly shorter for a roll-up cutout 3.

This arm 4 is also arranged to be able to easily adapt

different cases of figures, such as the box represented in the figure

2, that is, to be able to pick up indentations 3 provided with various and varied openings all over the indentation.

This arm 4, shown in Figure 3, is connected to a source of depression 12 at the level of each end thereof by circuits 13, 14.

Circuits 13 and 14 are separate and each as shown also in Figure 3, distributors 15 and 16, respectively, which are fed by the common vacuum source 12.

These distributors 15 and 16 open or close circuits 13 and

14 respectively and also allow to open the suction cups 5 of the closed circuit to prevent the suction cup (s) from remaining glued to the cutout 3.

Preferably, each suction cup 5 has its own three-way valve type valve 17. These valves 17 have various functions; they allow to select the suction cups 5 which are operational and, furthermore, they allow to separate the circuits 13, 14 in a chosen place on the arm 4, according to the type and shape of the cutouts 3.

These valves 17 are arranged at the level of each suction cup 5. They are constituted, as shown in FIGS. 4 and 5, of a three-way body 18. This body 18 is traversed by a conduit 19 and comprises a transverse conduit 20, which is located on the suction cup axis 5 and feeds thereon.

The feeding of each suction cup 5 is made by means of a rotary 21 which is housed in the body 18. This rotary 21 is arranged to allow three possibilities:

- feed the suction cup 5;

- divert this suction cup 5, ie, cut off its food without closing the conduit 19;

closing the conduit 19 by feeding the suction cup 5, that is, isolating the circuits 13 and 14 in relation to each other.

The swivel 21 is simply maneuvered with the aid of

a screwdriver, for example, which fits into slot 22 shown in figure 5. An arrow mark informs the operator about the direction of direction of the swivel 21.

The suction cups 5 are connected to each other by pipes 23 and they are integral with the arm 4 which may be in the form of a U-section bar. The arm 4 may also support several unrepresented perforated blocks which themselves comprise several suction cups 5. ; It may even consist of a single single bar that is drilled to its full length and on which the different suction cups are directly implanted.

The arm 4 allows the cutouts 3 to be removed from the shelf 2 and, in particular, as shown in Figure 1, curl-like cutouts; This extraction is performed with maximum efficiency, as this arm captures this cut-off at a large part of its height.

This type of cut-out 3, as shown at the entrance to shelf 2, therefore comprises several sides 7 which are marked L ', L ", L' and L", as well as turns 8 on both sides and tongue 9 on. collage mentioned earlier.

As shown in figure 1, arm 4 may have suction cups in contact with various sides of cutout 3 to perform extraction. All suction cups 5 are not operational; they are operational according to the position of the rotary 21, as represented in this figure 1.

In this figure 1, the suction cup 5-1, which is placed on the side L ', is deflected; it is deactivated for extracting cutout 3, so as not to lock the fold on this side L 'when placing this cutout in volume.

Always for this example, the suction cups 5-2 and 4 are active, such as the suction cups 5-5 through 7 and the suction cup 5-9.

Suction cups 5-3 and 5-8 are inactive, not fed; but they leave the corresponding circuits open.

It is at the level of the suction cups 5-4 or 5-5 that the two supply circuits 13 and 14 are separated to allow, after extraction of the cut-off 3, the suction of the suction cups 5-5 to 9; This deactivation of the suction cups 5-5 to 9 is indispensable for the placement of this cutout 3 in volume.

In Figure 1, the separation of circuits 13 and 14 is performed at valve level 5-4. This valve 5-4 allows the corresponding suction cup to be fed, but it closes circuit 13 and therefore circuit 14.

The operator intervenes, when changing the shape of the cuttings 3, on the different valves 17, and in particular the rotary knobs 21, to activate and / or deactivate suction cups 5 and to form two sectors: a qualifying sector P main sector, corresponding to the L 'side of these cuts that is affected, at the same time, in their extraction, but also in their volume, and a sector S that is affected only for the extraction of the cuts 3.

The activation of each sector P and S is done automatically by

on distributors 15 and 16; the two manifolds 15 and 16 simultaneously feed all suction cups 5 previously selected for the cutout extraction operation 3, and then the manifold 16 closes the circuit 14 supply and opens that circuit 14 to disable the suction cups 10 5- 5 through 9, releasing sides L "and L" of cutout 3 which are intended to be folded.

The two circuits 13 and 14 which feed the suction cups 5 are comprised of pipes accompanying the arm 4 in its oscillating motion, for example.

Figure 6 shows, in section, the piece 31 which is integral with the

the forming machine 3 and it is on this part 31 that the arm 4 is hinged by means of its support 32.

Circuits 13 and 14 are connected in a single pipe 34 which is double. This tubing 34 is clipped to a clamp system 35 and these clamps are disposed on the part 31 and on the bracket 32 of the arm 4.

This assembly has the advantage of being simple; It also allows the tubing 34 to be formed to form it by the pivot shaft located between bracket 32 of arm 4 and part 31 which is integral with the machine frame.

The deformation of this pipe 34 is thus better controlled;

it is more regular and the risks associated with friction with other parts are suppressed.

Claims (4)

1. Clipping device 3 on the shelf 2 of a machine, intended for its volume in the form of a box or other, characterized in that it comprises - at least one extraction arm 4 which is provided with suction cups 5 and - two circuits 13 and 14 which feed these suction cups 5, circuits 13 and 14 which are respectively connected to each end of that arm 4 and are furthermore provided with means to be active together or separately and these suction cups 5 are themselves provided in their entirety. or partly of three-way multifunction valves 17, valves 17 which are, on the one hand, capable of selecting the use of a maximum of suction cups 5 for the extraction operation of each cut-out 3 and, on the other hand, to isolate these circuits 13 and 14 from each other in order to enable deactivation of the suction cup (s) 5 to deviate for forming such cutouts 3, for example. Scrapping device 3 according to Claim 1, characterized in that the means for activating or inactivating the suction cup circuits 13 and 14 is made up of distributors 15 and 16 which permit the insertion of the suction cup. to the fast air of the fans 5, from the cut of the corresponding circuit. Cut-off device according to either of Claims 1 and 2, characterized in that the length of the cut-out extraction arm 4 corresponds substantially to the size of the largest of these cut-outs in the case of cut-outs. "American box" and a little less in the case of cut-outs for roll-up boxes. Clipping device 3 according to any one of claims 1 to 3, characterized in that the supply circuits 13 and 14 are upstream of the arm 4 in the form of a flexible tubing 34 which is provided in a manner. It is double, tubing 34 which cooperates with a clamp system 35 which ensures the attachment and positioning of this tubing over a line passing through the pivot axis located between bracket 31 of arm 4 and part 31 which is integral with that frame. of the machine.